Gas-engine.



G. E. PREDERICKSON. (ms ENGEEE.

APYLIGATION FILED MAY 9,1912 I F Iatented 1 31111225, 191% 3 SHEETS-SHEET 1.

' WITNESSES: INVENTOR GEi rederc'c Karma M w a zz 77 K 4 I fizz 4 z w I ATTORNEY;

U E. FR BDERIGKSON.

GAS ENGINE.

4 1 9 1 0O 2 n. p A a 6 t H e LIU a D1 0 1 9 1 9 Y A M D L L I r N 0 I T A O I L U P A 3 SHEETS-SHEET Z.

62 1 76626 rial/1070;

WITNESSES:

U. E. FREDERICKtaON. GAS ENGINE.

.AIPLLGATJOII ILLED MA! j, \912 A: I

' mwnted Apr. :28, 1914..

ITNITED STATES PATENT OFFICE.

CLAYTON E. FREDERICKSON, OF SAN FBANCISCQ: CALIFORNIA. ASSIG'NOB OF "NE- HALF TO WILLIAM H. ETENGER, OF SAN FRANCISCO, CALIFORNIA.

GAS-ENGINE.

To all 11*]107'1 it may concern Be it known that I. CLAYTON E. FRED- ERICKSON. residing at San Francisco, in the county of San Francisco and State of California, have invented a new and Improved Gas-Engine, of which the following is a specification.

My invention primarily'has for its object to provide an internal combustion engine more especially designed and adapted for use in motorcycle work and aerial navigation, in which engine, provision is made to reduce weight, equalize shocks and 'vibrations. and to simplifv the construction, operation, and reduce the maintenance cost of the engine.

The invention also resides in those novel details of construction, combination, and arrangement of parts. all of which will be first fully described and then be specifically pointed out. in the appended claims, reference being had to the accompanying drawings. in which Figure 1 is a top plan view of a four cylinder engine embodying the invention. Fig. a cross section on the line of Fig. 1. Fig. 3 is a vertical central longitudinal section of the engine. Fig. i is an enlarged vertical central longitudinal .-ection of one cylinder and 5 is a cross section on the line 7r--5 of Fig 4. Fig. 6 is a pro R filflll on the line iJ--- of Fig. i. i i". .1 tiiLtlll view of a par of the crank H221 nliri ranks. Fig. is a central horizontal section of a modified form of the engine. Fig. 9 is :1. side elevation of the form shown in Fig. 8, parts beingbrokcn away. Fig. 10 is a cross w tion on the line 10- -10 of Fig.

Referring now to the arennpanying drawings in which like numeral and letters of reference designate like parts in all the figures, it will be seen that the engine rompriscs the losed crank case 51. in bearings in which the crank shaft 52. journaled. The crank shaft 52 has the usual cranks 53, there beingnne for each cylinder in the form shown in Fig' 7 ot the drawings. The crank case 51 supports an oil reservoir 54 which is in communication with the crank case at 56, the opening being controlled by a back check at; whereby the oil from the crank ase rm; flow into the reservoir 5-}, v

but v iil aw; t bat-k through the opening 756 the crank. use.

Specification of Letters Patent.

Application filed May 9, 1912.

a part of th crank case. Fig. I

3.: the upper part 7 Patented Apr. 28, 1914.

Serial no. 696.060.

of the crank case 51. is another opening 57, through which oil is adapted to pass into the crank case from a suction pipe 59 that is in communication with the reservoir 54 and which is provided with a back check valve 58 The crank case 51 is reoessed t 60 to receive the cylinder section 61. The cylinder section 61 has a shoulder 62 to receive the plate or web'64 of the tubular guide 67, find the cylinder 61 is provided with air openings 63, while the tubular guide 67 is likewise provided with air openings 66. The.

web 64 has. a busbed bearing 65 for the piston rod 74,'and.the tubular guide or inner cylinder 67 has a second'web 68 that seats'in the recess 60, the guide67 projecting at 69 into the crank case 51 through the openings 70. It will be observed that there is a space or chamber 71 between the cylinder section 1 and the tubular guide 67. This space forms an air pocket or chamber for cooling purposes. The interior space 7 2 of the guide 67 is suitablv bashed and forms the chamber in which the auxiliary piston 73, operates. The piston 73 is also in function, a cross head to which the piston rod 74 and the connecting rod 76 are joined, he rod 76 being pivoted at 75 to the piston and also being pivoted to its respective crank 53.

77 designates the working piston which operate: in the working cylinder section 79. The cylinder 79 has the piston controlled n w charge inlet ports 80 that communicate with the ivy-pass duct 89, through which the llliplthfitl working agent from the com preseing chamber 82, is passed, viathe ports The working cylinder section 79 is also provided with piston controlled exhaust ports 84 from the workinglchamber 83. The working chamber is cooled by suitable radiators 85 or otherwise, and is closed by a cap 86, which is also provided with cooling elelllfillia and with the spark plug 87. The lay-pass 89 is formed of macadamite and has flanges 99 through which the securing bolts 91 The bolts 91 secure the macadamite exhaust pocket 92 and the niacadamite intake pocket 96 to the by-pass duct body 89 and over the respective cylinder ports, as best illustrated in Figs. 5 and 6 of the drawings.

93 designates the exhaust pipe of the cylinder which communicates-at 94 with the main exhaust duct 95 that delivers into the niuiiler 49.

. 9? is the fuel feed pipe from the carbucasings .109 designed to reeeive the slide valves 112, each of which has a port 113 tobring the opposite port's 108 and 110 into communication, at proper times. The valves 112 are operated by cams 114 on the crank shaft, and by connecting rods 115, as shown. The cams 114: are set 180 degrees apart and .90 degrees around from the position of the cranks, so that the cams will be imparting the slowest motion to the valves while the pistons are traveling fastest, and vice versa, thus allowing the ports to be wide open While the pistons are moving fastest, and thereby enabling the cylinders to be fully charged. The cvlinder sections '31 and 79 and caps or cover plates 80 are secured to one another and to the crank case 51 by suitable stay bolts '98 which pass through the radiator grooves. The back check valves 09 maybe provided in the exhaust duct 93 if desired.

In Figs. 8 at $1211.. I ha shown a modification of the invention in which the construction is still further lightened for enabling the engine to be well adapted for aerial navigation. In this form, the crank case is an open structure-made byuniting plates 100 and'a central ring 101 together by stav bolts 103 that through the same and through the spacing sleeves-102. The central ring 101 has bearing portions 104 to contain the anti-friction bearings 105 for the crank I shaft 106 of the engine. In this form, as in the other form; the engine is shown as a four cylinder one, in which the cranks are so related that diametrically opposite. cylin dcrs operate together in order to reduce shock and vibration.

In the operation of my invention, the pistons 73 on their out strokes cause a reduction of pressure in the crank ca so 51, thereby forced out through the passage 56 into the 7 reservoir 54, thus keeping up an eflicient circulation of the lubricant. The pistons 73 gathering oil will lubricate the tubular guides 67 and in order to keep the same cool, air will be drawn by the 'pistons 73 into the cham 71 7'2 andj'Tl, through the ports 63 and daring-one stroke of the piston73, h will be forced not s-f such chamciamber will be put uni.

hers on the other stroke. On ti out stroke oi /the piston 77 a new charge 'ottworaing agent will be draivn into the compression chamber 52, while the charge in a working compression. As soon as the piston 7'7 his reached the limit of its out stroke, the charge will be tired in the usual manner to impel the piston 77 on its working stroke thereby compressing the new charge by working agent in the compression chamber 82" until the piston 77 uncovers the ports 803ml 84, at which time the ((1111 )ressed new char e w'll enter the l t:

working chamber From the ft'iregoiug description takenrin connection with the accompanying drawings, it is thought the complete construc tion, operation, and advantages of the invention will-be apparent. to those skilled in the art. I,

What I claim is 1. In an internal combustion engine a crank case, a crank shaft mounted therein, a main cylinder mounted on said crank case, a stationary partition dividing said'cvlinder into an outer and an inner part, a w rking piston in said outer part-dividing the same into a working chamber and a pump chamher said main cylinder having a new charge inlet port and an outlet port for the'pumping chamber and having a new charge inlet port and an exhaust port for said working chamber, a bypass duct cylinder 0\ er said pumping chamber outlet port and said Working chamber inlet port to connect the same, anew charge duct secured over said pumping 'liainber inlet port and secured to said bypass duct. an exhaust duct secured over said exhaust port'andto said by-pass duct, said working chamber ports being piston controlled. and operative con nections between said working piston and said crank shaft.

2. in an internal combustion engine, a crank case. a crank shalt mounted therein, a main cylinder mounted on said "crank case, a stationary partition dividing said cylinder into an outer and an inner part, a working piston in said outer part dividing the same into a Working chan'ibcr and 1113111111) chamr, said main cylinder having a new charge secured on said inlet port and an outlet port for the pumpv ing chamber and having a new charge inlet port and an exhaust port for said Working duct secured over said exhaust port and to.

ports being p )2! controlled. a tubular cross head guide mounted in said inner cylmder part. a'eross' head piston in said uid.

said bv-pass duct. saidavorking chamber -a main cylinder mounted on said crank case. i

a piston rod rigidly connecting said pistons, a connecting rod between said cross head piston and said crank shafnand means for cooling said cross head piston and guide.

3. In an internal combustion engine, a crank case a crank shaft mounted therein, a main cylinder mounted on said crankcase, a stationary partition dividing said cylinder into an outer and an inner part, a working iston in said outer art dividing the same into a working chain er and a pump chamher, said main cylinder having a new charge inlet port and an outlet port for the pumplng chamber and haiiiig a new charge inlet port and an exhaust port for said Working chamber, a by-pass duct secured on said cyl inder over and pumping chamber outlet port, and said working chamber inlet port to connect the same, a new charge duct seover said pumping chamber inlet port and secured to said by-pass (llKh an exhaust duct secured over said exhaust port and to said by-pass duct, said working chamber ports being piston controlled. a tubular cross head guide mounted in said inner cylinder part, a. cross head piston in said guide. a piston rod rigidly connecting said pistons, a connecting rod bctwwn said cross head piston and said crank shaft. said cross head guidebein spaced from the walls of said inner cylinder part to leave a chamber, means for admitting air into said last named chamber and into said cross head guide between said cross head piston and said stationary partition.

4. In an internal combustion engine. a crank case, a crank shaft mounted thereon,

a working piston operating in said cylinder and dividing it into a working chamber and a compression chamber. a cross head cylinder mounted in said i'iiain cylinder and bin ing a flange forming a partition to separate said compression chamber from the crank caseend oi" said iiiaiii cylinder and troiii said cross head cylinder. said crisshead cylinder being spaced from said inaiii cyliiider to leave a chamber between said is'liiiders, means for hracin the crank ease end of said cross head cylin er, a cross head biston in said cross head cylinder. 2 piston rod connecting said pistons, a connecting rod connecting said crank shaft with said cross head piston, a piston controlled by-pass between said working and compression chain hers, and said main cylinder having a new 1 charge inlet to the ioinpression chamber, and an exhaust port for said working chamber.

In an internal combustion engine, a crank case, a crank shaft mounted thereon, a main cylinder mounted on said crank case. a \vorkin piston operating in said cylinder and divi ing it into a wor ing chamber and a compression chamber, a cross head cylinnet mounted in said main cylinder and having a flange forming; a 'artition to separate said compression (li'iiflYlQI from the crank case end of said main cylinder and from said cross head cylinder. a cross head piston iii said cr head cylinder, a piston rod coir iiecting said pistons, a connecting rod conmeeting said crank shaft with said Cl'l m head piston, a piston controlled by-pas's between said working and compression chainbers, and said main cylinder having a new charge inlet to the ompression chamber. an exhaust port for'said Working chamber, said Cl( head cylinder being spaced from the walls of the main cyiiiidei' to leave a pocket or chamber therein and said main cylinder and said cro s head ylinder havii'ig ports in communication with said pocket ii. In an internal combustion engine, a crank case, a crank lliifi mounted thereon. a main cylindrimounted on said -"l':iiil( ('tiH'. a working piston operating ll: said rylindi-r and dividing it inio it working liillll lll' and a iroiiipieiz-ii rhoinbt'r. a -i'l"l-- head cvliir dor mounted in Milli iiniiii cylinder and having a .tlangc fainting a partition to sepa rate said (Ullijil'l$-li li ('ll2il.lil)i'{ from the crank ease end oi aid niain cylinder and from said 'i'o.- head cylinder. said rank case having fill li'w'illigl to i'ti' 'li't one end of said cross iii-ad cylinder. mid cross head cylinder having a second flang to engage said crank cine, a cross head piston in .-aid cross head cylinder. :1 piston rod -oiii'icctiiig said pistons. a minim-ting rod connecting said crank {shaft with said i-ioss head piston. a pi ton ntrolled bypass hetivecii said Working and t-oiiipic -ioii i'liaiiiliers, said main (ii'ilil tlti' having a 1Ll'\" hargiiiilet to the li iiilii'i'mFiiili 'lilliii li 1'. an exhaust port for mid wo i-.in; 'lllllillNl'. -aid i'o'-. head i" nder :inniiniw'ii'ii :it its illliLl end with hitlil 'r'iii'iv I T. In an inn-211a; liil' iidl 'ili engine. a crank me. a rank ot! inoiii ii-d therein, ii liit'ilil t'vlll'l li irlnlliil 'l an said crank cow. :1 tationar; pat'iiiion dividing said cylinder into an outer and an inner part, a, working illtlt i! in rdl(l outer part dividing the saine into a uorkiiig chaiiiher aiid 2r piiinp chaiiilwr. ,flilfl liF lln cylinder having a new charge inlet port and an outlet port for the pumping chamber and having a new charge inlet port and an exhaust port for said working vhaiiiiwr. a bypass duct se- (ili'itl on said cyiindtr over said pumping chamber outlet port and said working chain her inlet port to' connect. the same, a new charge duct secured over said pumping chamber inlet port and sm-iired to said bypass duct. an exhaust duct secured over said exhaust port and to said by-pass duct, said working chiiniher ports being piston controlled, and operative connections between said working piston and said crank shaft, together with a slide valve device, and connections between said slide valve device and the new charge inlet port of the pumping cylinder, means for delivering working agent to said valve, and means for operating said slide valve from the crank shaft.

8. In an internal combustion engine, a crank case, a crank shaft mounted therein, a pair of Working cylinders each having a new charge iniz; port, a single slide valve for controlling the distribution of the charge to I the respective cylinder inlet ports. and means for moving said slide valve to open up communication with one or the othercylinder inlet ports at a time whereby said valve will reach its maximum opening position atthe fastest portion suction stroke of the piston. 4

9. In an internal combustion engine, a plurality of cylinders and their pistons, a crank shaft and a connecting rod between the crank shaft and each piston, said cylin-r last named means comprising a cam on the crank shaft set ninety degrees from the position of the crank, and a connection between said cam and said piston valve proper,

10. In an. internal combustion engine, a crank case, a crankshaft having a pair of cranks mounted in said case, a pair of engine cylinders and their pistons, each of said cylinders including new charge inlet and exhaust ports, a single valve device for let ports and a pair both of said cylinders, said valve device in i having a pair of inof outlet ports, fuel ducts between. the respective outlet ports of said valve casing and the respective inlet portsof said cylinders, fuel ducts between the inlet ports of said valve-casing and the source of fuel supply, a. slide valve in said valve casing having a single cross bringing one ing inlet ports into communication eluding a valve casing 1s in one position or another, and cooperative connectionsbetween said slide valve and said crank shaft for imparting motion to said slide valve. i

port for or the other of said valve cas-' with the ppposite outlet port according as said valve 11-. In an internal combustion engine, a I

crank case having a cylinder receiving seat, a main cylinder mounted on said seat and including a plurality of distinct sections placed end to end, and means for securing said sections together to said crank case, the abutting ends of a pair of said sections having shoulders to form an annular groove, a cross head cylinder mounted Within said main cylinder, and having an annular flange to seat in said groove, d'er having a gage the crank case, said cross head cylinder includinga portion projecting through the crank case wall into the crank case, a working piston inounted'on and operating in one section of said main cylinder, a cross head piston operating in said cross head cylinder, a piston rod rigidly connecting said said cross head cylinsecond annular'flange to enpistons to move in unison, a crankshaft ineluding a crank mounted within said crank case, a connecting rod between said crank and said cross head piston, said main cylinder having intake and exhaust ports c0- operative with said piston, and means for cooling saidcross head cylinder.

CLAYTON E. FREDERICKS'ON. WVitnesses V. P. Sessions, C. B. SESSIONS. 

